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#37116 - 06/10/08 05:45 AM What's the genotype of these marans?
Sandy V. Offline
Chicken

Registered: 06/05/08
Posts: 147
Loc: England
Please can you tell me what is the genotype for colour of red-brown marans (copper black in the UK)and silver-blue marans (here in the UK silver blue is the red-brown with the black gone to blue and the gold replaced by silver)

Also what is it for cuckoo maran

Thanks.

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#37117 - 06/10/08 12:05 PM Re: What's the genotype of these marans?
Choc Offline
Coop Keeper

Registered: 03/10/06
Posts: 489
Loc: England
Is this Sandy Hildreth?

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#37118 - 06/11/08 12:19 AM Re: What's the genotype of these marans?
Sandy V. Offline
Chicken

Registered: 06/05/08
Posts: 147
Loc: England
No, it's Sandy V from Oxfordshire, just recently started keeping marans :-))

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#37119 - 06/12/08 06:35 AM Re: What's the genotype of these marans?
Norwegian Offline
Coop Keeper

Registered: 08/31/03
Posts: 523
Loc: Norway
Red-brown:ER/ER,s+/s+ (or s+/-), b+/b+, bl+/bl+, id+/id+...

Silver-blue:ER/ER,S/S (or S/-), b+/b+, Bl/bl+, id+/id+...

Cuckoo: This is a bit more complicated as there are three "subgroups":

Dark cuckoo: E/E, S/S or S/-, B/B or B/-

Silver cuckoo: ER/ER, S/S or S/-, B/B or B/-

Gold cuckoo: ER/ER, s+/s+ or s+/-, B/B or B/-

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#37120 - 09/28/08 01:26 AM Re: What's the genotype of these marans?
Hen-Gen Online   content
Ruler of the Roost

Registered: 10/01/05
Posts: 1135
Loc: Island of Fetlar, Shetland
I'm glad you asked that question, Sandy, because its one that I question too.
Adult Copper Black Marans do look like they are gold birchen but the chick down colour looks more like E/E to me because they have that typical two tone down. I'm wondering whether they are E/E but without the necessary melanisers to give completely black plumage.
Anyone any thoughts on this?
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#37121 - 09/28/08 06:25 AM Re: What's the genotype of these marans?
Sigi Offline
Ruler of the Roost

Registered: 11/23/06
Posts: 1150
Loc: Holland
Chicks can have different patterns in one group of sibblings.
French breed for the pot. How pure the e-allele is, isn't very important. There are lots of different birds, depending where they come from.
The dull ones on the breast are ER, they have more lacing. The shiny ones can be E birds, less pattern on the breast. And they can be mixed. So I think they are not (necessarily) pure on the e-allele as long as they look like Marans.

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#37122 - 09/28/08 08:12 PM Re: What's the genotype of these marans?
Blackdotte Offline
Ruler of the Roost

Registered: 10/02/04
Posts: 913
Loc: Australia
The Gold & Silver Cuckoo may also be E and Pg, in Wyandottes they are eb & Pg

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#37123 - 09/29/08 05:12 AM Re: What's the genotype of these marans?
Norwegian Offline
Coop Keeper

Registered: 08/31/03
Posts: 523
Loc: Norway
What I posted was based on information from MCF, the french Marans club. As far as I remember, they claim eb does not exist in french Marans.

But as have been shown again and again, phenotypes that look more or less identical can have different genetics - espescially when they are on separate continents.

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#37124 - 10/02/08 11:12 AM Re: What's the genotype of these marans?
Sigi Offline
Ruler of the Roost

Registered: 11/23/06
Posts: 1150
Loc: Holland
... and bred for different purposes, lol

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#37125 - 10/08/08 12:27 AM Re: What's the genotype of these marans?
Sandy V. Offline
Chicken

Registered: 06/05/08
Posts: 147
Loc: England
Hen Gen, I also wondered about the chick down colour on these french marans.
Also, on another topic altogether, in a posting somewhere this year, you mentioned a gene in hens that means they only produce male offspring, it also has a funny slang name. I can't find the thread, please remind me what it was.
Thanks a lot.

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#37126 - 10/08/08 12:45 AM Re: What's the genotype of these marans?
Hen-Gen Online   content
Ruler of the Roost

Registered: 10/01/05
Posts: 1135
Loc: Island of Fetlar, Shetland
Well, Sandy, not only male offspring but 66% male to 33% female. Its called the ladykiller gene (lk) and is carried as a recessive by the male and is sex linked. So the half of his potential daughters who inherit it fail to develop in the egg.
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If you have nothing............
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#37127 - 10/08/08 06:16 AM Re: What's the genotype of these marans?
Hen-Gen Online   content
Ruler of the Roost

Registered: 10/01/05
Posts: 1135
Loc: Island of Fetlar, Shetland
Re-read that and realised that its not very clear. Its a recessive, sex linked gene. So one copy can be carried by a cockerel with no detrimental effects to him. However when bred from to any hen then half of his potential daughters die at about the third day of incubation. So,on average, out of twelve fertile eggs you get six cockerels, three pullets and three that die.
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If you have nothing............
......... give it away!

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#37128 - 10/09/08 04:54 AM Re: What's the genotype of these marans?
Sandy V. Offline
Chicken

Registered: 06/05/08
Posts: 147
Loc: England
Ah that's it Lady Killer! Thanks.

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